I need some professional help here fellas if anyone can help. I am a
big ram fan with a couple of half million kilo wreckers in my fleet
with no signs  of slowing down. I do all of the maint. myself except
injector pump work (their only weakness). Anyway for the last month the
speedo on my 99 4x4 cummins has been quiting but at the same moment the
air bag light comes on. It is not affected by bumps on the road. As I
accelerate it comes and goes even on smooth pavement. I am pretty sure
it does not use the rear axle sensor but a front abs pickup since the
rear has been broken off for a long time. I though perhaps the dash
panel or plugs on the back so I replaced it with no improvement.
Actually it is worse now. checked all fuses, unplugged and plugged lots
of stuff, scratched my head a lot. It's hard to bill customers when odo
no go. Dealer just shakes his head and says I can drop with a million
dollar deposit. Has anyone ever heard of such a problem. Or know where
I can get access to troubleshooting literature that will actually help.
I'm sure theres a connection between the speedo and the bags. When it
first started happening I was afraid she was gonna go off in my face
but now I'm used to it. Thanks for any help I can get, brian from
canada